Level Shifter

All of the Buffalo NAS devices have serial hardware built in, which they use for Linux kernel messages (console) as well as communication with the boot loader. While normal RS232 uses a nominal 12 volt for communication signals, the NAS's serial hardware signals are at 3.3v. It is therefore necessary to use a device which provides "level shifting" i.e. translates between the RS232 and 3.3v signal levels. The Terastations have this built in already, as a port designed to communicate with a UPS system however you will need to add one to a Linkstation or Kurobox.

The cheapest and most widely available level shifters are incorporated into some mobile phone data cables (see below), however slightly more work is required to determine the pin-out of these cables than if you buy some off-the-shelf converter kits.